Device for operating awnings



(No Model.)

G. K. BANOROFT. DEVICE FOR OPERATING AWNINGS.

No. 476,439. Patented June 7, 1892.

WITNESSES:

' UNITED STATES PATENT OFFICE.

GIDEON K. BANCROFT, OF PHILADELPHIA, PENNSYLVANIA.

DEVICE FOR OPERATING AWNINGS.

SPECIFICATION forming part of Letters Patent No. 476,439, dated June '7, 1892.

Application filed March 19,1892. Serial No. 425,534. (No model.)

To to whom it may concern.-

Be it known that I, GIDEON K. BANOROFT, a citizen of the United States, and a resident of the city and county of Philadelphia, and State of Pennsylvania, have invented certain new and useful Improvements in Devices for Operating Awnings, of which the following is a specification.

My invention relates to improvements in devices for raising and lowering awnings; and its object is to furnish a device for operating the chain-belt, which is usually used to revolve the roller upon which the awning is rolled, which will obviate the use of pawls in order to hold this chain-belt and the awning in any desired position, which cannot be tampered with by mischievous'persons, which can be placed with either side directly against a wall, and which may be adjusted to tighten the belt without removing the device from its position on the wall and without removing any of the links of the chain.

In devices of this nature as ordinarily constructed pawls are used which engage with a ratchet-wheel connected with the shaft, which carries the chain-wheel, in order to lock this chain-wheel, the chain, the awning-roller, and the awning in any desired position. A crank is used to turn the chain-wheel and its connected parts to raise or lower the awning. In these devices a great deal of trouble is had with mischievous persons raising the pawls and allowing the awnings to run down, and also in operating the awnings by pulling upon the chain-belt, which revolves the roller which carries the awning, which can easily be done by simply raising the pawl which looks the lower chain-wheel.

In the accompanying drawings, forming part of this specification, and in which similar letters of reference indicate similar parts throughout the several views, Figure 1 is a front elevation of my device; Fig. 2, a front elevation, the outer case being removed; Fig. 3, a section of Fig. 1 on line 1 2; Fig. 4, a front elevation of the bracket, which is screwed to the wall and which carries the box containing my apparatus; Fig. 5, a rear elevation of the box which carries the working part of my device, showing lugs for attaching it to bracket shown in Fig. 4; and Fig. 6 a side elevation of my combined worm and sprocket wheels.

A, Figs. 1, 2, 3, and at, is a bracket, preferably constructed of cast metal, which is screwed or otherwise suitably secured to the wall. Bis an orifice in this'bracket, the sides of which are limited, as shown by dotted lines, Fig. 4.

O is a box, the bottom of which is furnished with lugs D, which are adapted to enter the orifice D in the bracket B and to engage with the beveled sides of this bracket in order to attach the box to the bracket.

E is a cover which fits over the top of box 0 and which covers the working parts of the device.

F is a combined worm and sprocket wheel, which turns in bearings in the box 0 and cover E, and G is a worm, which also turns in bearings in this box and cover, but at right angles to the bearings of the wheel F and which drives this wheel. One end of the shaft of the worm G is squared, as shown at H, so that a crank may be attached to it to turn it.

The chain which operates the awning-roller is indicated by dotted lines in Figs. 1 and 2. It passes around the sprocket part a of the wheel F, and up and around a sprocket-wheel on the awning roller. (Not shown.) This chain supports the wheel F, the box 0, the cover E, and worm G.

Upon the base of the box 0 is a lug I, and upon the bracket A is a lug K. L is a bolt which passes through these lugs. A head upon this bolt rests against the inside of lug I, and a nut M on this bolt bears against the outside of lug K. By setting up the nut M the box 0 and its connected parts are drawn down and the chain tightened. The lugs D on the bottom of box 0 secure this box to the bracket A and allow the box to be moved up and down on the bracket A and at the same time prevent the box and its connected parts from being withdrawn from the bracket, which is permanently secured to the wall.

N, Fig. 4, is a notch on one side of the orifice B in bracket A, which allows the lugs D on the box 0 to pass in order to remove or put in place the box 0.

The worm G may be placed, as shown in the drawings, with its squared end to the left,

or, if the position of the apparatus on the building require it, the worm may be reversed, so that the squared end will project to the right.

The sprocket-wheel Cl, and the worm-wheel b are cast in one piece, and when the latter is in gear with the worm it is impossible to 0perate the chains so as to raise or lower the awning without turning the worm with a crank or its equivalent.

Having thus described my invention, I claim- 1. The combination, with the worn], wormwheel, and sprocket wheel and chain, of a box and cover having bearings for said wheels, a bracket secured to a wall, an orifice in this bracket with beveled sides, lugs on said box adapted to engage with said beveled sides, a lug I on said box, a lug K on said bracket, and a bolt L, and nut M, all substantially as and for the purposes set forth.

2. The combination of bracket A with orifice B, having beveled sides, as described, and a notch N, and lug K, of box 0, having lugs D, and lug I, a bolt L, and nut N, and a sprocket wheel and chain, and means for revolving this sprocket-wheel, all substantially as and for the purposes set forth.

GIDEON K. BANCROFT.

Witnesses:

MoRRrs R. BooKIUs,

CHAS. A. BUTTER. 

